U.S. patent application number 15/404036 was filed with the patent office on 2017-12-21 for interior trim part and method of manufacturing the same.
The applicant listed for this patent is Faurecia Innenraum Systeme GmbH. Invention is credited to Valentin GEOFFROY, Maxime MUSY.
Application Number | 20170361782 15/404036 |
Document ID | / |
Family ID | 58693100 |
Filed Date | 2017-12-21 |
United States Patent
Application |
20170361782 |
Kind Code |
A1 |
MUSY; Maxime ; et
al. |
December 21, 2017 |
INTERIOR TRIM PART AND METHOD OF MANUFACTURING THE SAME
Abstract
A process for producing an interior trim part (1) with a
decorative layer situated on a first side (S1) thereof and forming
a decorative pattern (M) for the interior of a motor vehicle, the
process comprising the following steps: (a) formation of at least
one cutout configuration (R), defined by a predetermined decorative
pattern (M), in a protective layer (120) situated on a first side
(S1), which is situated on a first surface (110a) of the
shell-shaped base body (110) made of a metallic material, (b)
deposition of sinterable decorative material on the first side (S1)
in such a way that the decorative material, as an intermediate
layer (150), covers at least the area in which the cutout
configuration (R) defined by the decorative pattern (M) is formed
in the protective layer (120), (c) laser-sintering of the
intermediate layer (150) inside the at least one cutout
configuration defined by the decorative pattern (M), (d) removal of
the sinterable decorative material that is situated outside the at
least one cutout configuration defined by the decorative pattern
(M), as well as an interior trim part (1).
Inventors: |
MUSY; Maxime; (Karlsruhe,
DE) ; GEOFFROY; Valentin; (Havange, FR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Faurecia Innenraum Systeme GmbH |
Hagenbach |
|
DE |
|
|
Family ID: |
58693100 |
Appl. No.: |
15/404036 |
Filed: |
January 11, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B32B 2255/28 20130101;
C23C 28/00 20130101; B32B 2255/26 20130101; C08J 2400/00 20130101;
B32B 5/18 20130101; C08J 5/12 20130101; B29L 2031/3005 20130101;
B32B 2605/003 20130101; B29C 65/48 20130101; B60R 13/0243 20130101;
B44C 3/10 20130101; C04B 35/195 20130101; B32B 2255/06 20130101;
B32B 2260/046 20130101; B32B 27/06 20130101; B32B 5/02 20130101;
C04B 35/64 20130101; B05D 5/06 20130101; B05D 2202/25 20130101;
B05D 7/52 20130101; C23C 24/10 20130101; C04B 35/16 20130101; B32B
15/20 20130101; B32B 37/12 20130101; B23K 35/286 20130101; B32B
2260/021 20130101; B32B 15/14 20130101; C04B 35/19 20130101; B32B
3/10 20130101; B29C 66/7422 20130101; B23K 35/0244 20130101; B32B
2255/20 20130101; B32B 1/00 20130101; B32B 15/046 20130101; B44C
1/228 20130101; C04B 35/62222 20130101; B32B 9/005 20130101; B32B
15/08 20130101; B32B 2451/00 20130101; B29K 2705/02 20130101; B05D
3/06 20130101; B32B 7/12 20130101; B32B 2605/08 20130101; B60R
13/02 20130101; C04B 2235/665 20130101 |
International
Class: |
B60R 13/02 20060101
B60R013/02; B29C 65/00 20060101 B29C065/00; B32B 7/12 20060101
B32B007/12; B32B 9/00 20060101 B32B009/00; B32B 15/08 20060101
B32B015/08; B29C 65/48 20060101 B29C065/48; C04B 35/64 20060101
C04B035/64; C04B 35/622 20060101 C04B035/622; C04B 35/195 20060101
C04B035/195; C04B 35/19 20060101 C04B035/19; C04B 35/16 20060101
C04B035/16; B32B 37/12 20060101 B32B037/12; C08J 5/12 20060101
C08J005/12 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 26, 2015 |
DE |
102015015313.7 |
Claims
1. A process for producing an interior trim part with a decorative
layer situated on a first side thereof and forming a decorative
pattern for the interior of a motor vehicle, the process comprising
the following steps: (a) forming at least one cutout configuration,
defined by a predetermined decorative pattern, in a protective
layer situated on a first side, which is situated on a first
surface of the shell-shaped base body made of a metallic material,
(b) depositing a sinterable decorative material on the first side
in such a way that the decorative material, as an intermediate
layer, covers at least the area in which the cutout configuration
defined by the decorative pattern is formed in the protective
layer, (c) laser-sintering the intermediate layer inside the cutout
configuration defined by the decorative pattern in order to produce
at least one hardened portion of the intermediate layer situated
inside said cutout configuration, (d) removing the sinterable
decorative material that is situated outside the cutout
configuration defined by the decorative pattern, so that the at
least one hardened portion of the intermediate layer and the
protective layer outside the latter form the decorative layer with
the predetermined decorative pattern.
2. The process according to claim 1, wherein the formation of the
cutout configuration in the protective layer defined by a
predetermined decorative pattern is produced by vaporization of the
material of the protective layer according to a predetermined
pattern.
3. The process according to claim 1, wherein the sinterable
decorative material contains a mineral substance.
4. The process according to claim 1, wherein a dispersion of
sinterable decorative material takes place when sinterable
decorative material is deposited on the first side.
5. The process according to claim 1, wherein the sinterable
decorative material is deposited on the first side in powder
form.
6. The process according to claim 1, wherein the base body is
formed from or comprises aluminum or an aluminum alloy.
7. The process according to claim 1, wherein an application of a
plastic reinforcement takes place on the second surface of the base
body, wherein the application of the plastic reinforcement takes
place in particular by adhesive bonding thereof and an adhesive
layer is applied between the second surface of the base body and
the plastic reinforcement.
8. The process according to claim 1, wherein an application of a
plastic reinforcement takes place on the second surface of the base
body, wherein, by back-molding of the base body at the second
surface thereof, the plastic reinforcement is applied thereon.
9. An interior trim part, comprising: a shell-shaped base body made
of a metallic material, a protective layer, which is situated on a
first surface of the shell-shaped base body, wherein at least one
cutout configuration defining a decorative pattern is formed in the
protective layer, and a decorative material layer made of a
sintered material, which at least partially fills the cutout
configuration in the protective layer.
10. The interior trim part according to claim 9, wherein the
material of the decorative material layer is a mineral material.
Description
[0001] The invention relates to an interior trim part and a process
for producing an interior trim part.
[0002] A process for producing an interior trim part with a ceramic
layer is known from DE 43 22 801 C1.
[0003] The problem of the present invention is to provide a process
for producing an interior trim part as well as an interior trim
part, which can be produced with a decorative layer with a
resistant and attractively formable decorative pattern or which
comprises a decorative layer with a resistant and attractively
formable decorative pattern.
[0004] This problem is solved with the features of the independent
claims. Further embodiments are specified in the sub-claims each
relating back to the latter.
[0005] According to the invention, a process for producing an
interior trim part with a decorative layer situated on a first side
thereof and forming a decorative pattern M for the interior of a
motor vehicle is provided, the process comprising the following
steps: [0006] (a) formation of at least one cutout configuration,
defined by a predetermined decorative pattern, in a protective
layer situated on a first side, which is situated on a first
surface of the shell-shaped base body made of a metallic material,
[0007] (b) deposition of sinterable decorative material on the
first side in such a way that the decorative material, as an
intermediate layer, covers at least the part of the area in which
the cutout configuration defined by the decorative pattern is
formed in the protective layer, [0008] (c) laser-sintering of the
intermediate layer inside the cutout configuration defined by the
decorative pattern in order to produce at least one hardened
portion of the intermediate layer situated inside said cutout
configuration, [0009] (d) removal of the sinterable decorative
material that is situated outside the cutout configuration defined
by the decorative pattern, so that the at least one hardened
portion of the intermediate layer and the protective layer outside
the latter form the decorative layer with the predetermined
decorative pattern.
[0010] "Cutout configuration" is understood here to mean at least
one cutout of the protective layer, wherein the at least one cutout
is constituted as a through-opening in particular extending in a
planar manner, which arises or is produced by a complete removal of
the protective layer which has taken place over a limited area
corresponding to the size of the through-opening.
[0011] In an embodiment of the process according to the invention,
provision is made such that the formation of the cutout
configuration in the protective layer defined by a predetermined
decorative pattern is produced by vaporisation of the material of
the protective layer according to a predetermined pattern. A laser
is preferably used for this.
[0012] In an embodiment of the process according to the invention,
provision is made such that the sinterable decorative material
contains a mineral substance.
[0013] In an embodiment of the process according to the invention,
provision is made such that a dispersion of sinterable decorative
material takes place when sinterable decorative material is
deposited on the first side.
[0014] In an embodiment of the process according to the invention,
provision is made such that the sinterable decorative material is
deposited in powder form on the first side.
[0015] The intermediate layer of sinterable material preferably has
a thickness between 1 .mu.m and 500 .mu.m and in particular a
thickness between 5 .mu.m and 100 .mu.m.
[0016] To produce a mineral hardened portion of the intermediate
layer, mineral and in particular ceramic sinterable decorative
material can be deposited on a first surface of the base body,
which is hardened in particular by sintering in a subsequent step.
The mineral material to be deposited can be a mixture of a mineral
substance with a plastic and in particular a thermoplastic.
[0017] The process according to the invention has the advantage
that the protective layer is removed only at those points or in
those areas at or in which the intermediate layer is sintered. The
metallic surface outside the decorative pattern thus remains
protected by the protective layer.
[0018] Only local heating of an intermediate product involved in
the given process step occurs with laser sintering, so that melting
of any plastic part that may be used can be avoided.
[0019] In a sequence of process steps (a) to (d), very precise
decorative patterns can be produced on the surface of the given
intermediate product, which decorative patterns can be reproduced
extremely well. This applies especially in the case where the same
laser and optionally the same clamping device are used for the
sintering as for the formation of the cutout configuration.
[0020] In the process according to the invention, it is possible to
produce a sinterable substance and in particular a sintered mineral
substance in the form of a predetermined precise pattern as a
decorative layer on an intermediate layer. The decorative material
layer is preferably constituted as a mineral and as a hard
layer.
[0021] The sinterable material of the decorative material layer can
be a mixture of a mineral substance or mineral material with a
plastic and in particular a thermoplastic. The mineral material of
the decorative material layer can be formed from or comprise
ceramic materials, such as for example borosilicate or an
aluminosilicate, which is for example alkali aluminosilicate or
alkaline-earth aluminosilicate
[0022] The decorative pattern produced in each case can thus be
quickly and easily changed, since the partial removal of the
protective layer and the sintering on the basis of specifications
with regard to the predetermined decorative pattern can be stored
by way of a set of coordinate data in the sintering device.
[0023] As a result of the possibility of producing very precise
decorative patterns reliably on an intermediate product involved in
the given process step, the quantity of rejects in the production
process can be kept very small.
[0024] The sequence of process steps according to the invention
also ensures that the plastic reinforcement reliably remains intact
in subsequent process steps.
[0025] In an embodiment of the process according to the invention,
provision is made such that the application of the plastic
reinforcement on the second surface of the base body takes place by
adhesive bonding of the same and an adhesive layer is applied
between the second surface of the base body and the plastic
reinforcement.
[0026] In an embodiment of the process according to the invention,
provision is made such that an application of a plastic
reinforcement takes place on the second surface of the base body,
wherein, by back-moulding of the base body at the second surface
thereof, the plastic reinforcement is applied thereon.
[0027] In an embodiment of the process according to the invention,
the sinterable decorative material comprises a mineral
substance.
[0028] The mineral material or the mineral substance that is used
for the decorative material is preferably formed from ceramic
materials, such as for example borosilicate or an aluminosilicate,
which for example can be alkali aluminosilicate or alkaline-earth
aluminosilicate. The mineral material or the mineral substance can
also comprise these materials.
[0029] According to a further aspect of the invention, an interior
trim part is provided, said interior trim part comprising: [0030] a
shell-shaped base body made of a metallic material, [0031] a
protective layer, which is situated on a first surface of the
shell-shaped base body, wherein at least one cutout configuration
defining a decorative pattern is formed in the protective layer,
[0032] a decorative material layer made of a sintered material,
which at least partially fills the cutout configuration in the
protective layer.
[0033] The interior trim part can furthermore comprise a plastic
reinforcement, which is applied in a planar manner to a second
surface of the shell-shaped base body situated opposite to the
first surface.
[0034] In an embodiment of the interior trim part according to the
invention, the base body is formed from aluminium or an aluminium
alloy or comprises a metallic material and in particular aluminium
or aluminium alloy.
[0035] In an embodiment of the interior trim part according to the
invention, the plastic reinforcement is adhesively bonded to the
second surface of the base body.
[0036] The term "intermediate product" is understood in the
description of this invention to mean each product arising in
intermediate steps within the process according to the invention
before completion of the interior trim part to be produced.
According to this definition, an intermediate product arises in
each intermediate step, but not in the last process step of the
process for producing the interior trim part.
[0037] Alternatively, provision can be made such that the plastic
reinforcement is formed by back-moulding of the base body at the
second surface thereof.
[0038] Embodiments of the invention are described below with the
aid of the appended figures, in which:
[0039] FIG. 1 shows a cross-sectional drawing to represent an
initial state of the process according to the invention for
producing an interior trim part, wherein the base body is prepared
from a metallic material, wherein a protective layer covers at
least in sections a first surface of the base body,
[0040] FIG. 2 shows a cross-sectional drawing to represent an
optional further step of the process, according to which, for the
application of a plastic reinforcement on a second surface, an
adhesive layer has been arranged on the second surface,
[0041] FIG. 3 shows a cross-sectional drawing to represent an
optional further step of the process, in which the plastic
reinforcement has been applied to the second surface of the base
body by means of the adhesive layer,
[0042] FIG. 4 shows a cross-sectional drawing to represent a
further step of the process, in which the protective layer is
removed in sections by vaporisation by means of a laser according
to a predetermined decorative pattern, so that a cutout
configuration defined by the decorative pattern is formed in the
protective layer,
[0043] FIG. 5 shows a perspective representation of an embodiment
of an intermediate product with the base body and the protective
layer, in which the cutout configuration defined by the decorative
pattern is formed,
[0044] FIG. 6 shows a detail of the embodiment of the intermediate
product according to FIG. 5 in a cross-sectional representation as
a section along line L6-L6 drawn in FIG. 5,
[0045] FIG. 7 shows the representation of a process step, in which
a dispersion or liquid of sinterable and in particular mineral
material is deposited, as an intermediate layer, on a first side of
the intermediate product, in such a way that said intermediate
layer covers at least the area in which the cutout configuration
defined by the decorative pattern is formed in the protective
layer,
[0046] FIG. 8 shows the representation of a process step, in which
laser sintering is carried out on the first side or the outer
surface of the intermediate layer inside the cutout configuration
defined by the decorative pattern,
[0047] FIG. 9 shows the representation of a process step, in which
a removal of the dispersion or liquid of sinterable material
present in the non-sintered state takes place from the area which
is situated outside the cutout configuration defined by the
decorative pattern,
[0048] FIG. 10 shows a cross-sectional representation of the
production state that is reached after the step according to FIG. 9
has been carried out, so that the interior trim part is available,
and
[0049] FIG. 11 shows a perspective representation of an embodiment
of the interior trim part, which has been produced by the
aforementioned process steps.
[0050] According to the process according to the invention, an
interior trim part 1 with a decorative layer situated at a first
side S1 thereof and forming a decorative pattern M is produced for
the interior of a motor vehicle. The interior trim part can for
example be a door panel for application on the side of the vehicle
door facing the interior, an instrument panel or an armrest.
[0051] A shell-shaped base body 110 made of a metallic material,
which extends in a planar manner, is used for interior trim part 1
produced according to the process according to the invention. The
planar extension of base body 110 is constituted by first surface
110a and a second surface 110b situated opposite to first surface
110a. First surface 110a is situated at a first side S1 of base
body 110. A first side S1 and a second side S2 of interior trim
part 1 are defined for the subsequent description, wherein first
surface 110a is situated facing first side S1 and second surface
110b is situated facing second side S2. Shell-shaped base body 110
preferably has in its main area the shape of interior trim part 1
to be produced, apart from further layers to be deposited on base
body 110 in the production of interior trim part 1. If need be,
base body 110 can however also be further shaped or processed.
[0052] The base body 110 can have a thickness between 0.1 mm and 10
mm, preferably up to 5.0 mm and in particular a thickness between
0.1 mm and 2.0 mm. The base body 110 is formed from a metallic
material or comprises a metallic material. In particular, provision
can be made such that base body 110 is formed from or comprises
aluminium or an aluminium alloy.
[0053] A protective layer 120 is situated on first surface 110a of
shell-shaped base body 110. Provision can be made such that
protective layer 120 extends over entire first surface 110a.
Provision can also be made such that protective layer 120 extends
only over a part, i.e. in sections, over first surface 110a. The
material of base body 110 can be a metal, in particular aluminium
or at least in part an oxide of a metal and in particular aluminium
oxide. Base body 110 can be formed from or comprises a basic body
and a surface layer covering the latter, wherein the material basic
body is made of metal and in particular aluminium and the surface
layer is made of an oxide of a metal and, when the material basic
body is formed from aluminium, of an aluminium oxide. In
particular, provision can be made such that the surface layer
constitutes surface 110a. The surface layer can cover the basic
body in sections or completely.
[0054] The protective layer is formed from or comprises plastic,
e.g. is formed from or comprises a UV hardened lacquer of urethane
acrylate.
[0055] A further step can optionally be provided, wherein a plastic
reinforcement 130 is applied as a layer and in particular in a
planar manner on second surface 110b of shell-shaped base body 110
for the formation of intermediate product Z1. Alternatively,
provision can for example be made such that a rib-shaped plastic
reinforcement 130 is applied to second surface 110b of shell-shaped
base body 110. According to an embodiment, provision can be made
such that plastic reinforcement 130 only partially covers second
surface 110b. In the state shown in FIG. 3, plastic reinforcement
130 is applied as a layer and in a planar manner to second surface
110b of base body 110.
[0056] Plastic reinforcement 130 can serve to stabilise and in
particular to increase the strength of shell-shaped base body
110.
[0057] Plastic reinforcement 130 can for example be constituted as
a layer, which covers second surface 110b in a planar manner or
covers a main area thereof. Plastic reinforcement 130 can also be
formed from a plurality of strips.
[0058] The plastic reinforcement can be a plastic with or without
additives and for example a thermoplastic or a foam. The plastic
reinforcement can also be a fibre-reinforced plastic.
[0059] The application of plastic reinforcement 130 to second
surface 110b can take place by adhesive bonding. FIG. 2 represents
how an adhesive layer 131 is applied to second surface 110b of base
body 110, in order to apply plastic reinforcement 130 to second
surface 110b by means of adhesive layer 131 (FIG. 3).
Alternatively, provision can be made such that base body 110 is
back-moulded with plastic at its second surface 110b, optionally
without an adhesive layer, so that there is formed on second
surface 110b a reinforcement layer connected to the latter in a
planar manner, said reinforcement layer at least partially covering
second surface 110b.
[0060] According to the invention, a process step represented in
FIG. 4 is provided for the formation of an intermediate product Z2,
wherein at least one cutout configuration R defined by a
predetermined decorative pattern M is formed in protective layer
120 situated on first side S1. The "cutout configuration" is formed
from at least one cutout in protective layer 120. Generally, cutout
configuration R can be formed from a single cutout or a single,
i.e. coherent, cutout portion or from a plurality of cutout
portions. In the case of the formation of cutout configuration R
from a plurality of cutout portions, the latter can be situated
beside one another and separate from one another, so that the
latter do not verge into one another or are arranged
contiguously.
[0061] In the embodiment shown in FIGS. 4 and 5, cutout
configuration R is formed from two cutout portions R1 and R2 in the
form of through-openings of protective layer 120. A first cutout
portion R1 is formed from a plurality of branch portions R11, R12,
R21, R22, which run together in a central cutout R3 or are
connected to the latter. A second cutout portion R2 is constituted
strip-shaped and extends along the extension of first cutout
portion R1.
A cutout portion arises by the planar removal of material of
protective layer 120 up to first surface 110a of base body 110.
Provision can in particular be made such that the surface-portion
configuration of surface 110a laid bare by cutout configuration R
is the surface of the surface layer made of an oxide of a metal
and, in the case of the formation of the material basic body from
aluminium, of an aluminium oxide.
[0062] The planar removal can take place by vaporisation of the
material of the protective layer in a predetermined decorative
pattern. Vaporisation of the material of the protective layer is
preferred, because with this process step it can be ensured in a
particularly reliable manner that no residual material will remain
on the surface of the base body inside the cutout configuration.
The material is preferably vaporised with a laser. Vaporisation is
understood here also to mean sublimation or ablation or a
combination of sublimation and ablation. The cross-sectional
representation shown in FIG. 6 shows a cutout R2 as such a
through-opening of protective layer 120.
[0063] Cutout configuration R--viewed in cross-section along the
extension thereof--is formed in particular by lateral faces RS,
which are each formed from protective layer 120 and which lie
facing one another, and a bottom face RB which border cutout RA
open towards first side S1. Bottom face RB is formed by a portion
of first surface 110a (FIG. 6).
[0064] FIG. 4 shows a step of the process in which the protective
layer is removed in sections by evaporation by means of a laser
according to a predetermined decorative pattern, so that a cutout
configuration defined by the decorative pattern is formed in the
protective layer. The coordinates of the decorative pattern are
preferably stored in a data memory and are used by the laser to
produce the decorative pattern in protective layer 120.
[0065] According to the invention, provision is made such that a
deposition of sinterable material as a decorative-material
intermediate layer 150 on first side S1 takes place in a subsequent
step, in such a way that decorative material D as intermediate
layer 150 at least covers the area in which cutout configuration R
defined by decorative pattern M is formed in protective layer
120.
[0066] In particular, provision can be made such that a deposition
of a dispersion of sinterable decorative material as a
decorative-material intermediate layer 150 at first side S1 takes
place in a subsequent step, in such a way that the dispersion as an
intermediate layer 150 at least covers the area in which cutout
configuration R defined by decorative pattern M is formed in
protective layer 120.
[0067] Provision can be made such that intermediate product Z3 with
base body 110, with mineral intermediate layer 150 and with plastic
reinforcement 130 lies on a workpiece holding fixture H.
[0068] In this process step, provision can be made such that the
sinterable decorative material is present in powder form and is
introduced in powder form into cutout configuration R.
[0069] Alternatively, provision can be made such that the
sinterable decorative material is present and deposited as a
dispersion, e.g. as a binder dissolved in a solvent with decorative
material in powder form introduced into the latter. A spraying
device 155 is shown in this regard in FIG. 5.
[0070] The decorative material is sinterable in particular inasmuch
as it can be hardened by heat input, in particular by means of a
laser beam. Provision can be made such that base body 110 or
plastic reinforcement 130 is held and fixed by a holding fixture
H.
[0071] Layer 150 of decorative material comprises an outer surface
150a facing first side S1 and can be deposited relatively thinly.
The thickness of the deposited layer can in particular lie in the
range between 1 and 500 .mu.m especially--viewed in the extension
of intermediate product Z3--outside cutout configuration R. In
particular, the thickness of the deposited layer can lie between 20
and 100 .mu.m.
[0072] The decorative material, in particular the powdery
decorative material, can comprise one or more of the following
components or can comprise each of them respectively: ceramic
powder, plastic, moulding sand, metal powder, polyurethane for
example in particle form or in droplet form.
[0073] Furthermore, provision can be made such that the decorative
material is deposited by spraying or by mechanical deposition. FIG.
7 represents a deposition by means of a spraying device 155. The
deposition and optionally the distribution of the decorative
material on first side S1 of base body 110 is in particular
provided for in such a way that--viewed in particular in the
extension of intermediate product Z3--a relatively thin uniform
intermediate layer 150 of decorative material is situated on first
side S1 of base body 10 inside and optionally also outside cutout
configuration R.
[0074] In a further step, laser sintering of this
decorative-material intermediate layer 150 takes place by means of
at least one laser jet L1 of a laser device L (FIG. 8) inside
cutout configuration R defined by decorative pattern M, wherein the
area, viewed in the extension of intermediate product Z3, outside
cutout configuration R is not sintered. At predetermined, i.e.
desired or preprogrammed on the basis of predetermined decorative
pattern M, points of decorative material layer 150, which lie
inside cutout configuration R and in particular respective cutout
portion R1, R2, laser energy is fed into the latter, as a result of
which the material of the portions of decorative-material
intermediate layer 150 which form the decorative pattern and which
are situated inside cutout configuration R and in particular
respective cutout portion R1, R2 are sintered locally (FIG. 8). A
layer thus arises on base body 110, which is formed from hardened
portions and optionally, viewed in the extension of intermediate
product Z4, non-hardened portions situated outside cutout
configuration R, wherein locally limited sintering of the
decorative material has been achieved in the hardened portions. The
intermediate product thus arising is referred to in FIG. 8 by
reference symbol Z4.
[0075] The same laser is preferably used for the sintering as for
the removal of the protective layer material. A resolution of
better than 30 .mu.m can be achieved by this process step.
[0076] In a further process step, removal of non-hardened portions
190 (FIG. 9) takes place, so that thereafter hardened portions 191
or generally the at least one hardened portion 180 of the
intermediate layer and protective layer 120 outside the latter form
the decorative layer with predetermined decorative pattern M. The
intermediate product during the removal of non-hardened layer 190
is referred to FIG. 9 by reference symbol Z5. Portions 181, 182,
183 of hardened portion 180 of interior trim part 1 are represented
in FIGS. 10 and 11, which are each situated in a respective branch
portion R11, R12, R2.
* * * * *